Frederick c



(No Model.)

F. O. AVERY.

VISE.

Patented May 27, 1890.

UNITED STATES PATENT FFIcE.

FREDERICK O. AVERY, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CHARLES L. JENNESS, OF SAME PLACE.

VISE.

SPECIFICATION forming part of Letters Patent No. 429,105, dated May 2'7, 1890.

Application filecl'November 4, 1889- Serial No. 329,145. (No model.)

To all whom it may concern: O. The screw O consists of a single integral Be it known that I, FREDERICK O. AVERY, piece comprising two portions 1 and 2. The of Chicago, in the county of Cook and State portion 1 is of greater diameter than the porof Illinois, have invented certain new and tion 2, and has a single-threaded screw cut 5 useful Improvements in Vises, of which the thereon. The portion 2 is of smaller diamefollowing is a specification. ter, and has a double or other multiplex The object of my invention is to produce a threaded screw cut thereon of greater pitch vise having a powerful grip, which shall be than that on the part 1. The hole in the part strong and simple in construction, and which B is tapped to fit the thread cut on portion 2 10 shall be provided with two pairs of permaof the screw O, and the partA is tapped to fit nent jaws having different sized openings, so the portion 1 of the screw O. The result of that the range of its capacity may be thereby this construction is that when G is screwed increased. into the parts A and B differential closing My improved vise may be applied to a vamotion is imparted to the latter equal to the I 5 riety of purposes; but in the accompanying difference in the pitch between the screws on drawings I have shown one having jaws spethe two portions .1 and 2 of the screw C. By cially adapted to grasp a round object. If reversing the movement the jaws are opened. made of the size shown in the drawings or By constructing the screw O as just desomewhat smaller, it is suitable for holding scribedthat is, bymaking the portion 2, next 20 pieces of wire or as a spoke-grip for screwing the point, the smaller and cutting thereon a up the spokes of suspension-wheels, such as double-threaded screw of greater pitch than are used in bicycles and other light vehicles. that of the portion near the head-I retain If made of a larger size, it is adapted for ample strength in the screw. If asingle thread screwing in studs or gas-pipes. of greater pitch than that upon the head por- 2 5 In the accompanying drawings, Figure l is tion were out upon the point of the screw, the

a side, and Fig. 3 an edge, elevation of the thread upon the point would necessarily be vise complete. Fig. 2 is a central longitudiso coarse as to out too deeply into the point nal section of the same on a plane parallel to of the screw, which would thereby be weakthe edge of the vise-jaws. Figs. 4, 5, and 6 ened, or the screw-thread at the head of. the 0 show the several parts of the vise detached. screw would be so fine as to lack durability.

The vise consists of two parts A and B, On the other hand, if the coarser thread were drawn together by the screw O, which is at the head of the screw, then to close the vise turned by the thumb-piece D. The part A, it would be necessary to turn the screw out which for convenience of designation I will from the part A in order to close the vise-jaws, 5 term the fixed part of the vise, is chanand the greatest pressure would come upon neled or slotted so that its general outline as the screws when the fewest threads upon the viewed from the edge resembles the letter U. part A and the screw C were left in engage- Part B, which for convenience of designation ment. I will call the movable part,has aprismatic In order to give a better hold upon a circa- 40 body, which fits the slot a in the part A, and lar object, the jaws on the partA are made V- at one end is provided with a projecting-jaw shaped and the opposite jaws form an acute on each side I) b. The portions 0 c of the angle with the body of the part B. The V- part A, which are left on each side of the slot shaped edge of the part A if applied to an oba, form jaws, which are in opposition to the ject having a painted or enamel surface will 45 jaws b b of the part B when the two are necessarily mar it to some extent; but I have placed together. Holes are drilled lengthwise found that if the edge be notched, as seen at 5 through the parts A and B, so as to register d cl, Fig. 1, the paint or enamel will be much with each other when the parts are in place, less flaked. By making one or more notches, and are tapped for the reception of the screw as e, in the thumb-piece of the vise it may be used as a wrench for small nuts and bolts. This is especially useful in connection with a spoke-grip, as the notches may be made to fit the small nuts or nipples which are sometimes used for securing the spokes.

hat I claim, and desire to secure by Letters Patent, is

1. The combination, in a vise, of two parts, as A and B, one part having a channel or slot cut therein, a jaw or jaws, as c 0, being left on one or on each side of the channel, and the other part having a prismatic body, which is fitted to the slot in the former, both said parts having screw-threaded holes which register with each other and are adapted to receive a diiferentially-threaded screw for moving said FREDERICK C. AVERY.

Witnesses:

IRWIN VEEDER, C. L. JENNESS. 

